init

k8s_rke.md

+# Create RKE rancher cluster
+
+## Longhorn
+
+* Create ext4 partition on secondary disk and mount it on /data (add to fstab)
+
+* Install open-iscsi
+
+```
+apt install open-iscsi
+```
+
+## Java ram limit for opensearch
+
+```
+sudo sysctl -w vm.max_map_count=262144
+```
+
+## Create cluster
+
+Add nodes (all etcd / control plane / worker) with public IP as private
+
+## Install Longhorn
+
+Install longhorn 
+Add /data disks, remove defaults
+